Parameters in a dynamically compressed xenon plasma laser

Papayoanou, A.; Buser, Rudolf G.; Gumeiner, I.

doi:10.1109/jqe.1973.1077552

Cited by 20 publications

(5 citation statements)

References 17 publications

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“…the cavity until threshold w as reached for a particular line. T he results can be seen in Table II, together w ith values from other authors for com parison [14], [28].…”

Section: I L a S E R G A I Nmentioning

confidence: 79%

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Excitation mechanisms and characterization of a multi-ionic xenon laser

Sobral

Raineri

Schinca

et al. 1999

IEEE J. Quantum Electron.

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The emission characteristics of an ultraviolet-visible pulsed multi-ionic xenon laser were studied through time-resolved spectroscopy and the results were interpreted using a collisional radiative theoretical model. This analysis includes more than 20 laser lines belonging to several ionic species (Xe III VIII). Depending on the experimental conditions, different temporal distributions of the laser lines and their corresponding sponta neous emissions can be observed. In particular, laser emission presents temporal oscillations near threshold. Pumping processes for the laser transitions have been analyzed by using this model. Relativistic Hartree Fock calculations of laser level lifetimes and radiative transition probabilities were performed. Experimental laser gain for several transitions were obtained and compared with the theoretical values derived from the calculations.Index Terms Collisional-radiative model, gas discharge, gas lasers, xenon laser. I. In t r o d u c t i o n S IN C E TH E advent o f the laser, capillary discharges have been used to produce laser action in the ultraviolet (U V), visible, and infrared (IR) range [l]-[ 4 ]. In particular, lowpressure xenon plasm a excited by pulsed h igh-current-highvoltage electrical discharges produces high gain laser transi tions in the near U V and visible range. This laser output has been used for pum ping dye lasers [5] [7] and for studying injection locking phenom ena in CW dye lasers [8 ], [9].B oth from a basic and practical point o f view , it is im portant to know w hich are the levels and ionic species involved in laser em ission. D uchow icz et al. [10] show ed that m ost visible laser em issions belong to Xe V w hile UV em issions belong in general to X e VTI. In recent w orks, m ost o f the unresolved laser lines w ere attributed to X e V [11], X e VII [12], and X e V III [13].

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“…the cavity until threshold w as reached for a particular line. T he results can be seen in Table II, together w ith values from other authors for com parison [14], [28].…”

Section: I L a S E R G A I Nmentioning

confidence: 79%

“…F ollow ing another line o f research, Papayoanou et al [14] reported on the param etrization o f a xenon plasm a laser including observations about the tem poral distribution o f the output. Sasaki and Saito [15] have obtained double pulsed o u tput w hen the plasm a w as excited w ith a long current pulse.…”

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confidence: 99%

Excitation mechanisms and characterization of a multi-ionic xenon laser

Sobral

Raineri

Schinca

et al. 1999

IEEE J. Quantum Electron.

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“…La El efecto que se obtiene al liberar rápidamente la energía almacenada en el capacitor, genera un pulso corto de corriente que atraviesa el gas concentrado en el tubo de descarga. Esto produce un campo magnético alrededor del mismo, responsable de una contracción dinámica del plasma, conocido como Efecto Pinch pudiendo demostrarse que la acción láser ocurre dentro del volumen de esa contracción [5]. Por lo tanto, el perfil del pulso muestra que la zona de mayor concentración de corriente se encuentra en el centro del tubo de descarga.…”

Section: Otros Resultados Y Aplicacionesunclassified

Abordaje de la enseñanza de aspectos importantes de la física moderna a traves del uso de un laser de xenon multi-ionico pulsado

Gallardo¹,

Laquidara²,

Almandos³

2007

Rev. Bras. Ens. Fis.

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Este trabajo tiene por finalidad presentar un láser de Xe multi-iónico pulsado, a partir del cual se pueden realizar demostraciones, prácticas de laboratorio o iniciar trabajos de investigación en temas de física moderna, espectroscopía atómica y láseres gaseosos, así como para ser utilizado en la enseñanza de grado y postgrado. Además, el empleo de todo el instrumental que compone el equipo, permite tomar contacto con fuentes de alta tensión, equipos de vacío, deóptica y con el uso de detectores y analizadores de radiación luminosa, instrumental que generalmente no se utiliza dentro de los esquemas de la enseñanza tradicional. Palabras clave: física moderna, enseñanza, láser.This work intendes to present a pulsed multi-ionic Xe laser to perform demonstrations, lab experiments or begin research works in topics of modern physics, atomic spectroscopy and gaseous lasers. It can be used also in the graduate and post-graduate teaching. In addition, the use of all the instruments that compose the equipment allows to make contact with high voltage power supplies, high vacuum technique, optical assemblies and the use of light detectors and radiation analyzers, which are instruments that generally are not used within the traditional teaching. Keywords: modern physics, teaching, laser. IntroducciónLas currículas que rigen las carreras de grado en física e ingeniería, incluyen temas y experiencias deóptica y física moderna, que no alcanzan a cubrir con amplitud conceptos que resultan fundamentales cuando el alumno está alcanzando el final de sus estudios, por lo que carece de los conocimientos experimentales suficientes para iniciar su etapa de investigación o de aplicación tecnológica de lo aprendido en la misma.Un alumno avanzado de grado o en general un asistente a un curso de post-grado, no ha participado activamente en prácticas de laboratorio o demostraciones en donde se utilizaban redes de difracción, bombas y detectores de vacío, analizadores de radiación luminosa, fuentes de alimentación, etc. y en mucha menor medida, tomado contacto directo con un láser de enseñanza.Con seguridad, su interacción con un emisor de radiación estimulada -LASER -se realizó con un equipo comercial con el que sólo puede obtenerse un dado color y una determinada potencia, sin posibilidad alguna de cambio u observación de su constitución interior.Los láseres han tenido un gran impacto en las más importantes ramas de la ciencia y sus aplicaciones tecnológicas, por lo que saber cómo están constituidos, su funcionamiento y las características de su tan particular emisión, deberían formar parte del conocimiento de un profesional en estasáreas.El objetivo de este trabajo es describir un dispositivo láser experimental, en este caso gaseoso, en sus orígenes concebido para investigación científica, que permita transferir dentro de la enseñanza universitaria, conocimientos más profundos en diversos temas de la ciencia y la tecnología.Desde hace muchos años, alumnos de ingeniería y ciencias, de Universidades Argentinas, así como participantes Latin...

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“…The low-pressure capillary discharge is similar to the one used to study the spectra of highly ionized xenon [18,19] and earlier on for xenon ion laser excitation [20]. In our experiment, we use the quartz discharge tube, with a 3 mm inner diameter, and aluminium electrodes (with 3 mm diameter holes) located 200 mm apart.…”

Section: Methodsmentioning

confidence: 99%

“…The measurements are performed in a gas mixture (1.5% N 2 , 1.5% CO 2 and 97.0% He) at the initial pressure of 4 mbar. The discharge is driven by a 0.36 µF low-inductance capacitor charged to 7 kV and fired by the deuterium filled thyratron EEV CX 1154, instead of a spark gap [18][19][20]. With the described circuitry, a 'pinch-like' discharge current shape with a peak current of 600 A, and with 3.5 µs duration is obtained; see figure 1(a).…”

Section: Methodsmentioning

confidence: 99%

Stark broadening of 3s³P⁰–3p³D and 3p³D–3d³F⁰transitions along carbon isoelectronic sequences of ions revisited

Ivković¹,

Nessib²,

Konjević³

2005

J. Phys. B: At. Mol. Opt. Phys.

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The Stark widths of N II and O III spectral lines belonging to 3s 3P0–3p 3D and 3p 3D–3d 3F0 multiplets have been calculated and measured in a capillary discharge plasma. The calculations are extended to the same multiplets of F IV and Ne V ions. The plasma electron density in the capillary discharge is determined from the width of the He II Pβ line, while the electron temperature is measured from the relative intensities of N II lines. A comparison of the experimental and theoretical data shows good mutual agreement, which is well within the estimated experimental and theoretical uncertainties. The theory predicts the ratio of the corresponding N II to O III line widths to be larger than unity, in disagreement with our earlier experiment in a pulsed arc. In the new experiment, where all spectral lines were recorded under the same plasma conditions, the theoretical predictions and the results of the capillary experiment are in agreement. The possible sources of an error in the earlier experiment are indicated.

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Parameters in a dynamically compressed xenon plasma laser

Cited by 20 publications

References 17 publications

Excitation mechanisms and characterization of a multi-ionic xenon laser

Excitation mechanisms and characterization of a multi-ionic xenon laser

Abordaje de la enseñanza de aspectos importantes de la física moderna a traves del uso de un laser de xenon multi-ionico pulsado

Stark broadening of 3s³P⁰–3p³D and 3p³D–3d³F⁰transitions along carbon isoelectronic sequences of ions revisited

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Parameters in a dynamically compressed xenon plasma laser

Cited by 20 publications

References 17 publications

Excitation mechanisms and characterization of a multi-ionic xenon laser

Excitation mechanisms and characterization of a multi-ionic xenon laser

Abordaje de la enseñanza de aspectos importantes de la física moderna a traves del uso de un laser de xenon multi-ionico pulsado

Stark broadening of 3s3P0–3p3D and 3p3D–3d3F0transitions along carbon isoelectronic sequences of ions revisited

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Stark broadening of 3s³P⁰–3p³D and 3p³D–3d³F⁰transitions along carbon isoelectronic sequences of ions revisited